“The Internet is filled with junk and jerks. It is commonplace for inhabitant of the Internet to complain bitterly about the lack of cooperation, decorum, and useful information. The signal-to-noise ratio, it is said, is bad and getting worse. Even a casual trip through cyberspace will turn up evidence of hostility, selfishness, and simple nonsense. Yet the wonder of the Internet is not that there is so much noise, but that there is any significant cooperation at all.”